Steel fiber high-strength concrete and preparation method thereof

Abstract

The invention relates to steel fiber high-strength concrete and a preparation method thereof, and belongs to the technical field of concrete, and relates to concrete. The steel fiber high-strength concrete is prepared from 125-170 parts of water, 400-480 parts of cement, 700-760 parts of fine aggregate, 800-900 parts of coarse aggregate, 80-105 parts of fly ash, 85-105 parts of mineral powder, 10-15 parts of silica fume, 5-7 parts of additive, 10-18 parts of organic fibers and 6-15 parts of modified steel fibers. The modification method of the modified steel fibers comprises the following steps: mixing a silane coupling agent, alcohol and deionized water to obtain a modification solution, immersing steel fibers into the modification liquid, performing stirring, and taking out and drying the steel fibers to obtain the modified steel fibers. The preparation method comprises the following steps: mixing an admixture with half of water to obtain a mixed solution; mixing the organic fibers,the modified steel fibers and half of the mixed solution to obtain a mixture; mixing cement, fly ash, mineral powder, silica fume and the mixture to obtain a primary mixture; mixing the fine aggregate, the rest mixed solution and the primary mixture to obtain a base material; and mixing the coarse aggregate, the balance of water and the base material to obtain the concrete. The method has the effects that the bonding strength of the steel fibers and the concrete is improved, and the compression resistance of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a steel fiber high-strength concrete and a preparation method thereof. Background technique [0002] Steel fiber reinforced concrete is a new type of multiphase composite material formed by mixing random distributed short steel fibers into ordinary concrete. These randomly distributed steel fibers can hinder the expansion of micro-cracks and the formation of macro-cracks in concrete, improve the tensile, bending, and impact resistance of concrete, thereby improving the durability of concrete. [0003] The existing Chinese patent whose publication number is CN108264280A can be referred to, which discloses a steel fiber concrete comprising the following components in parts by weight, 800-900 parts of cement, 50-100 parts of silica fume, and 40-310 parts of steel fiber , 910-1370 parts of river sand, 165-275 parts of water, 10-33 parts of admixture, 50-150 parts of inorganic miner...

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions have the following defects: steel fibers can hinder the expansion of micro-cracks inside the concrete and improve the flexural performance of concrete, but the bonding performance between steel fibers and concrete components is poor. When the concrete is destroyed , most of the steel fibers are easily pulled out, thus affecting the compressive performance of steel fiber reinforced concrete

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